Dummy Fuse Gravity Polarizer for Safe Earthing
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Solution Overview
Problem
Existing false fuses for earthing electrical cabinets do not prevent inappropriate positioning, which can lead to unsafe grounding and risk of electrocution during maintenance or repair, as they lack effective mechanisms to ensure correct alignment with terminal blocks.
Innovation Solution
A false fuse with a polarizer that automatically moves between active and inactive positions under gravity, preventing cooperation with the terminal block when incorrectly positioned, ensuring safe grounding by only allowing connection when correctly aligned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a false fuse with symmetrical configuration is used, then ease of operation is improved, but reliability deteriorates due to risk of inappropriate positioning
Solution Approach 1:
The patent applies asymmetry by making the false fuse non-symmetrical in shape, specifically with a connector that has a specific orientation (e.g., angled or asymmetric contact surfaces) that only fits into the terminal block in the correct orientation. This physical asymmetry prevents operators from inserting the false fuse incorrectly, thereby maintaining ease of operation while ensuring grounding safety through forced correct positioning.
2Reliability
If a polarizer with automatic positioning under gravity is added, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by incorporating a polarizer element that automatically positions itself using gravity without requiring external control systems, motors, or complex actuation mechanisms. The polarizer contains conductive elements that, when positioned correctly, create an electrical connection that completes the grounding circuit. This self-positioning mechanism achieves reliable positioning accuracy while minimizing device complexity by relying on passive gravitational force rather than active control systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The polarizer's automatic positioning mechanism prevents unsafe grounding attempts, ensuring the electrical cabinet is properly earthed, thereby guaranteeing operator safety and correct earthing during maintenance or repair.
Implementation Method 1
drive means for driving the polarizer in movement between at least the inactive position and at least the active position, respectively between at least the active position and at least the inactive position, of this corrector, this under the effect of gravity
Data Source
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AI summary
The invention relates to a dummy fuse (1), intended to cooperate with a terminal block of an electric cabinet and including: -an electrically conductive connector (2), intended to cooperate with one terminal of the terminal block; -an insulating connector (3), intended to cooperate with another terminal of the terminal block (B); -electrically conductive receiving means (4), configured to receive earthing means; - means for electrically linking the conductive connector (2) and the receiving means (4); - a poka-yoke (6) for preventing the dummy fuse (1) and the terminal block from cooperating; - and means for mounting (7) the poka-yoke (6) so that it can move between at least one active position of the poka-yoke (6) and at least one inactive position of the poka-yoke (6). The dummy fuse (1) further includes drive means for driving the movement of the poka-yoke (6) between at least the inactive position and at least the active position, and between at least the active position and at least the inactive position, respectively, of the poka-yoke (6) under the effect of gravity.